片側接地の虚数抵抗を用いた複素R<sup>i</sup>CRフィルタの一構成  [in Japanese] Synthesis of a Complex R<sup>i</sup>CR Filter Using Grounded Imaginary Resistors  [in Japanese]

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Author(s)

    • 藤井 達哉 Fujii Tatsuya
    • 筑波大学 システム情報工学研究科 Graduate School of Systems and Information Engineering, University of Tsukuba
    • 庄野 和宏 Shouno Kazuhiro
    • 筑波大学 システム情報工学研究科 Graduate School of Systems and Information Engineering, University of Tsukuba

Abstract

<p>In this paper, a synthesis of a complex R<sup>i</sup>CR filter is proposed. The proposed prototype filter includes terminating resistors, floating capacitors and grounded imaginary resistors only. Because the proposed R<sup>i</sup>CR filter includes no floating imaginary resistors, we can reduce the active elements when we realize the filter using OTA's and capacitors. The proposed prototype filter is obtained through a frequency transformation and an equivalent transformation using imaginary gyrators. Using imaginary gyrators composed of imaginary resistors, we can transform all the inductors into capacitors. The condition for reducing the floating type imaginary resistors is described. The proposed method is based on symmetry of the circuit configuration. The proposed method can be applied to not only odd-order filters but also even-order filters. As an example, a 5th-order complex R<sup>i</sup>CR filter is designed. The proposed filter is compared with the conventional ones from the view points of the gain characteristics, the number of the required elements and element value spread.</p>

Journal

  • IEEJ Transactions on Electronics, Information and Systems

    IEEJ Transactions on Electronics, Information and Systems 139(1), 2-11, 2019

    The Institute of Electrical Engineers of Japan

Codes

  • NII Article ID (NAID)
    130007542218
  • NII NACSIS-CAT ID (NCID)
    AN10065950
  • Text Lang
    JPN
  • ISSN
    0385-4221
  • NDL Article ID
    029439992
  • NDL Call No.
    Z16-795
  • Data Source
    NDL  J-STAGE 
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